Michelle Obama Prom Dress: Revealed on Ellen!

During a speaking engagement to mark the one-year anniversary of her Joining Forces initiative, which helps honor and support America's military families, Michelle Obama brought in a special guest live via satellite:

Ellen DeGeneres!

In addition to discussing this very worthy cause Monday, the First Lady and Ellen rehashed their push-up contest from earlier this year. Take a look:

In the second half of their talk, Ellen spoke with military families, and then delighted the audience by unveiling a photo of Michelle's senior prom dress ...

"That split was a little high," Obama said, laughing. "I don't know if I'd let my kids go out with a split that high, so let's not show this to Malia and Sasha."

It's not what you think of when you think of Michelle Obama photos nowadays, no. Ellen showed off her amazing prom pic too. Check it out below:

Iâ€™m thrilled that the California supreme court overturned the ban on gay marriage. I canâ€™t wait to get married. We all deserve the same rights, and I believe that someday weâ€™ll look back on this and not allowing gays to marry will seem as absurd as not allowing women to vote.